Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KW1X callsign genealogy
Currently held by WILSON, JOHN A
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by KW1X's current licensee, walking backwards.
- Hofstra, Mark PMAgranted 2021-03-11cancelled 2022-12-09
Successor callsigns
Callsigns held now by people who previously held KW1X.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KW1X, oldest first.
- WILSON, JOHN A FL2010-08-24 → cancelled 2022-11-22
- Hofstra, Mark P MA2022-12-09 active